Ultra fast curing industrial assembly sealant & adhesive Sikasil AS-790 is a 2-component, non-corrosive, exceptionally fast-curing silicone sealant and adhesive designed for industrial processes. - Allows fast handling of bonded parts
- Excellent adhesion to many substrates
- Outstanding UV and weathering resistance
- Long-term durability
- Pumpable over long distances
- Low volatility
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PRODUCT BENEFITS - Allows fast handling of bonded parts
- Excellent adhesion to many substrates
- Outstanding UV and weathering resistance
- Long-term durability
- Pumpable over long distances
- Low volatility
Usage Sikasil AS-790 is designed for high demanding and fast processing industrial assembly and sealing applications. Typical application areas are in appliances and automotive. Common substrates are metals, particularly aluminium, glass, metal primers and paint coatings (2-part systems), ceramic materials and plastics. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed ensuring adhesion and material compatibility. Packaging Sikasil AS-790 (A) Sikasil AS-790 (B) |
Typical Product Data| Chemical base | | 2-component silicone | | Cure mechanism | | Polycondensation | | Cure type | | Neutral | | Mixing ratio | A:B by volumeA:B by weight | 10:1 13:1 | | Consistency | | Paste | | Application temperature | ambient | 5 ─ 35 °C | | Snap time (CQP554-1) | | 5 minutes A | | Tack free time (CQP019-3) | | 10 minutes A | | Shore A hardness (CQP023-1 / ISO 48-4) | | 40 | | Tensile strength (CQP036-1 / ISO 527) | | 1.6 MPa | | 100 % modulus (CQP036-1 / ISO 527) | | 1 MPa | | 12.5 % modulus (CQP036-1 / ISO 37) | | 0.3 MPa | | Elongation at break (CQP036-1 / ISO 527) | | 200 % | | Tear propagation resistance (CQP045-1 / ISO 34) | | 2.5 N/mm | | Thermal resistance (CQP 513-1) | 4 hours1 hour | 200 °C 220 °C | | Service temperature (CQP513-1) | | -40 ─ 150 °C |
| Sikasil AS-790 (A) | Sikasil AS-790 (B) |
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Technical Information CURE MECHANISM Sikasil AS-790 starts to cure immediately after mixing the two components.
The speed of the reaction depends mainly on the temperature, i.e. the higher the temperature the faster the curing process. Heating above 50 °C could lead to bubble formation and is therefore not allowed.
The mixer open time, i. e. the time the material can remain in the mixer without flushing or extrusion of product, is significantly shorter than the snap time indicated above.
Advice on specific applications is available from the Technical Department of Sika Industry.
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Application Information Surface Preparation Surfaces must be clean, dry and free from grease, oil and dust. Surface treatment depends on the specific nature of the substrates and is crucial for a long lasting bond. Application Before processing Sikasil AS-790 both components have to be mixed homogeneously and air-bubble-free in the correct ratio as indicated with an accuracy of ± 10 %. Most commercially available metering and mixing equipment are suitable. For advice on selecting and setting up a suitable pump system, contact the System Engineering Department of Sika Industry.
Consider that the B-component is moisture-sensitive and must therefore only be exposed briefly to air.
Joints must be properly dimensioned. Tooling and finishing Tooling and finishing must be carried out within the snap time of the adhesive. No tooling agents must be used. Removal Uncured Sikasil AS-790 can be removed from tools and equipment with Sika Remover-208 or another suitable solvent. Once cured, the material can only be removed mechanically. Hands and exposed skin have to be washed immediately using hand wipes such as Sika Cleaner-350H or a suitable industrial hand cleaner and water. Do not use solvents on skin. Overpainting Sikasil AS-790 cannot be overpainted. Application Limits Sikasil AS-790 may only be used for serial application after a detailed examination of the corresponding project details by Sika Industry. |
The above design is only a sample of the options available, for reference purposes only. Our policy of continuous improvement may result in a change of specifications without notice. If any discrepencies might be between the data sheet values and standards, we reserve the rights to make technical changes. Our company will not be held responsible, as all or any of pictures, drawings, weights and dimensions details or other elements in this document are only indicative and must not be considered contractual. Contact our sales team for other specifications or custom made products.
Contact our sales team for other specifications or custom made products.
